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#include "libmain/common-args.hh"
#include "libmain/shared.hh"
#include "libstore/store-api.hh"
#include "nix/command.hh"
using namespace nix;
struct CmdBuild final : MixDryRun, InstallablesCommand {
Path outLink = "result";
CmdBuild() {
mkFlag()
.longName("out-link")
.shortName('o')
.description("path of the symlink to the build result")
.labels({"path"})
.dest(&outLink);
mkFlag()
.longName("no-link")
.description("do not create a symlink to the build result")
.set(&outLink, Path(""));
}
std::string name() override { return "build"; }
std::string description() override {
return "build a derivation or fetch a store path";
}
Examples examples() override {
return {
Example{"To build and run GNU Hello from NixOS 17.03:",
"nix build -f channel:nixos-17.03 hello; ./result/bin/hello"},
Example{"To build the build.x86_64-linux attribute from release.nix:",
"nix build -f release.nix build.x86_64-linux"},
};
}
void run(ref<Store> store) override {
auto buildables = build(store, dryRun ? DryRun : Build, installables);
if (dryRun) {
return;
}
for (size_t i = 0; i < buildables.size(); ++i) {
auto& b(buildables[i]);
if (!outLink.empty()) {
for (auto& output : b.outputs) {
if (auto store2 = store.dynamic_pointer_cast<LocalFSStore>()) {
std::string symlink = outLink;
if (i != 0u) {
symlink += fmt("-%d", i);
}
if (output.first != "out") {
symlink += fmt("-%s", output.first);
}
store2->addPermRoot(output.second, absPath(symlink), true);
}
}
}
}
}
};
static RegisterCommand r1(make_ref<CmdBuild>());
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